The V3 accessory attaches easily to the base of the Freestyle2 Keyboard (sold separately) allowing quick and reproducible slope settings of 5, 10 and 15 degrees without the use of integrated palm supports. It provides a highly stable typing platform with no "bounce" and can be used with or without the pivot/tether. (The pivot tether connects the two keying modules of the Freestyle2 keyboard together. Disconnect the pivot tether if greater separation is required.) Requires Kinesis Freestyle2 Keyboard, not included.